A flow totalizing scale

Abstract

The present invention belongs to the technical field of flow scales, specifically a flow cumulative scale, comprising a base frame, a shell is fixed on the top of the base frame, a feed hopper is fixed on one side of the top of the shell, a discharge hopper is fixed on the side of the shell away from the feed hopper, a conveyor belt is arranged inside the shell, a baffle is fixed on the side of the top of the discharge hopper away from the conveyor belt, rollers are arranged on both sides and the middle of the conveyor belt, the outer rotation of the roller is connected to a first support frame, a motor is installed at one end of the first support frame, and a cleaning structure for cleaning the surface of the conveyor belt is arranged under the conveyor belt; the inside of the vacuum shell is evacuated by a material receiving hood, so that the material receiving hood can absorb the powdered materials remaining on the surface of the conveyor belt, and the powdered materials can be filtered out through the pipe, and at the same time, the gas drawn into the vacuum shell is discharged by the gas outlet hood, and the gas can be heated by the heating wire to dry the moisture on the surface of the conveyor belt after the gas is sprayed out.

Description

Technical Field

[0001] The invention belongs to the technical field of flow scales, in particular to a flow accumulation scale. Background Art

[0002] A flow totalizer is a device used to weigh and accumulate the weight of materials. It is mostly used to weigh granular or powdered materials. A flow totalizer is generally used in the material transportation process. It uses a conveyor belt to drive the material at a uniform speed and accumulate the weight of the material during the transportation process.

[0003] A patent application with the existing publication number CN107179110A discloses a split belt flow scale, which weighs materials by constant speed feeding. The weighing sensor senses the weight of the constant speed feeding, and then adjusts the weight of the feeding according to the weight change through variable frequency feeding.

[0004] When the above technical solution is used, the weighed material needs to be placed on a conveyor belt, wherein some powdered materials will adhere to the conveyor belt, and some materials will carry moisture during the conveying process, causing the materials to clump on the surface of the conveyor belt, resulting in errors in the weighing weight and affecting the accuracy of the data.

[0005] To this end, the present invention provides a flow accumulating scale. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a flow cumulative scale described in the present invention includes a base frame, a shell is fixed on the top of the base frame, a feed hopper is fixed on one side of the top of the shell, a discharge hopper is fixed on the side of the shell away from the feed hopper, the discharge hopper extends to the bottom of the shell, a conveyor belt is arranged inside the shell, a baffle is fixed on the side of the top of the discharge hopper away from the conveyor belt, the height of the baffle is higher than the height of the top of the conveyor belt, rollers are arranged on both sides and the middle of the conveyor belt, the outer side of the roller is rotatably connected to a first support frame, a motor is installed at one end of the first support frame, the motor is connected to the rotating shaft of one of the rollers through a reducer, and a cleaning mechanism for cleaning the surface of the conveyor belt is arranged below the conveyor belt.

[0008] Preferably, the cleaning mechanism includes an exhaust shell arranged below the conveyor belt, the bottom end of the exhaust shell is fixedly connected to the bottom end of the inside of the outer shell, connecting pipes are fixed on both sides of the top of the exhaust shell, an exhaust fan is installed inside one of the connecting pipes, a material receiving hood is fixed on the top of the connecting pipe away from the exhaust fan, a cloth pipe is arranged inside the exhaust shell, the bottom end of the exhaust shell passes through the inside of the bottom end of the outer shell, and the bottom end of the exhaust shell extends to the bottom of the outer shell.

[0009] Preferably, the top end of the cloth pipe is connected to the connecting pipe close to the material receiving cover, the lower open end of the cloth pipe is fixedly connected to the lower open end of the exhaust shell, and the bottom end of the exhaust shell is threadedly connected to a bottom cover.

[0010] Preferably, an air outlet hood is fixed to the side of the air extraction shell away from the material receiving hood, and a plurality of heating wires are fixed at equal intervals inside the air outlet hood.

[0011] Preferably, a second support frame is arranged above the material receiving hood, the top end of the second support frame is fixedly connected to the first support frame, and a pressure roller is rotatably connected to the middle part of the second support frame, and the bottom end of the pressure roller pushes the conveyor belt into the interior of the material receiving hood.

[0012] Preferably, an elastic plate is fixed to the outside of the pressure roller, and six elastic plates are arranged at equal intervals outside the pressure roller, and the extending direction of the elastic plates is opposite to the moving direction of the conveyor belt.

[0013] Preferably, a pressure rod is provided on one side of the pressure roller, the pressure rod is arranged on one side of the extension direction of the elastic plate, and the top end of the pressure rod is fixedly connected to the second support frame.

[0014] Preferably, two groups of clamping rollers are rotatably connected on both sides of the second support frame, each group of clamping rollers is provided with two, and the two clamping rollers are arranged above and below one side of the second support frame, and the conveyor belt is clamped between the two clamping rollers.

[0015] Preferably, a movable slot is opened on the side of the top of the material receiving hood close to the air outlet hood, and a cleaning brush roller is arranged above the movable slot, and a movable frame is arranged on the side of the lower side of the second supporting frame close to the cleaning brush roller, and two groups of movable frames are provided, and the two groups of movable frames are rotatably connected to both ends of the cleaning brush roller, and a first pulley is fixed to the end of the rotating shaft at both ends of the cleaning brush roller, and a transmission gear is rotatably connected to the side of one end of the movable frame away from the first pulley, and a second pulley is fixed to the end of the transmission gear close to the first pulley, and a belt is arranged on the outer side of the first pulley and the second pulley, and output gears are fixed to the ends of the rotating shafts at both ends of the clamping roller, and the output gear is meshingly connected with the transmission gear.

[0016] Preferably, an electric telescopic rod is fixed to the side of the second support frame away from the cleaning brush roller, the output end of the electric telescopic rod is fixedly connected to one side of the movable frame, a guide rod is arranged above the electric telescopic rod, one end of the guide rod is fixedly connected to the movable frame, a guide hole is opened inside the second support frame, and one end of the guide rod away from the movable frame is inserted into the guide hole.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The flow totalizing scale described in the present invention can exhaust air from the inside of the exhaust shell through the material receiving hood, so that the material receiving hood can absorb the powdered materials remaining on the surface of the conveyor belt and filter out the powdered materials through the pipes. At the same time, the gas drawn into the exhaust shell is discharged from the gas outlet hood, and the gas can be heated by the heating wire to dry the moisture on the surface of the conveyor belt after the gas is sprayed out.

[0019] 2. The flow accumulating scale described in the present invention can press the conveyor belt into the inside of the material receiving cover by the pressure roller, which has a better cleaning effect. The conveyor belt can be lifted up by the elastic plate to crack the material on the surface of the conveyor belt. At the same time, when the elastic plate hits the conveyor belt, the cracked material falls into the inside of the material receiving cover. The cleaning brush roller simultaneously cleans the surface of the conveyor belt to make it easier for the material on the surface of the conveyor belt to enter the inside of the material receiving cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 is a stereogram of the present invention;

[0022] Figure 2 is a cross-sectional view of the present invention;

[0023] Figure 3 It is a schematic diagram of the internal structure of the vacuum shell in the present invention;

[0024] Figure 4 It is a schematic diagram of the pipe layout structure in the present invention;

[0025] Figure 5 It is a schematic diagram of the support frame structure in the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the pressing roller in the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the clamping roller in the present invention;

[0028] Figure 8 It is a schematic diagram of the cleaning brush roller structure of the present invention.

[0029] In the figure: 1. base frame; 2. shell; 21. feed hopper; 22. discharge hopper; 3. conveyor belt; 31. roller; 32. first support frame; 33. motor; 4. weighing sensor; 5. exhaust shell; 51. exhaust fan; 52. receiving cover; 521. movable slot; 53. exhaust cover; 531. heating wire; 54. cloth pipe; 55. bottom cover; 6. second support frame; 61. pressure roller; 611. elastic plate; 612. pressure rod; 62. clamping roller; 621. output gear; 63. cleaning brush roller; 631. first pulley; 632. movable frame; 633. transmission gear; 634. second pulley; 635. electric telescopic rod; 636. guide rod; 64. guide hole. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0031] like Figure 1 to Figure 2 As shown, a flow totalizing scale described in an embodiment of the present invention comprises a base frame 1, a shell 2 is fixed on the top of the base frame 1, a feed hopper 21 is fixed on one side of the top of the shell 2, a discharge hopper 22 is fixed on the side of the shell 2 away from the feed hopper 21, the discharge hopper 22 extends to the bottom of the shell 2, a conveyor belt 3 is arranged inside the shell 2, a baffle is fixed on the side of the top of the discharge hopper 22 away from the conveyor belt 3, the height of the baffle is higher than the height of the top of the conveyor belt 3, rollers 31 are arranged on both sides and the middle of the conveyor belt 3, the outer side of the roller 31 is rotatably connected to the first support frame 32, a motor 33 is installed on one end of the first support frame 32, the motor 33 is connected to the rotating shaft of one of the rollers 31 through a reducer, and a cleaning mechanism for cleaning the surface of the conveyor belt 3 is arranged below the conveyor belt 3;

[0032] When the material is being transported, it is necessary to weigh the material. At this time, the material is put into the feed hopper 21, and the material enters the interior of the outer shell 2 through the feed hopper 21 and falls on the top of the conveyor belt 3. During this process, the motor 33 drives the roller 31 to rotate, and the conveyor belt 3 is driven to roll during the rotation of the roller 31. When the conveyor belt 3 rolls to the position of the discharge hopper 22, the material will fall into the interior of the discharge hopper 22, and the material is output to the outside through the discharge hopper 22. During the process of the conveyor belt 3 conveying the material, the first support frame 32 presses down the weighing sensor 4, and the weighing sensor 4 records the weight changes of the conveyor belt 3 in real time. The total weight of the conveyed material can be obtained through the recorded data. During the conveying process of the conveyor belt 3, the cleaning structure can clean the outer side of the conveyor belt 3 to prevent powdered material from adhering to the surface of the conveyor belt 3. Long-term accumulation causes errors in the weighing of the conveyor belt 3, affecting the weighing accuracy.

[0033] like Figures 2 to 4As shown, the cleaning mechanism includes an exhaust shell 5 arranged below the conveyor belt 3, the bottom end of the exhaust shell 5 is fixedly connected to the bottom end of the inside of the outer shell 2, connecting pipes are fixed on both sides of the top of the exhaust shell 5, an exhaust fan 51 is installed inside one of the connecting pipes, a material receiving cover 52 is fixed on the top of the connecting pipe away from the exhaust fan 51, a pipe 54 is arranged inside the exhaust shell 5, the bottom end of the exhaust shell 5 passes through the inside of the bottom end of the outer shell 2, and the bottom end of the exhaust shell 5 extends to the bottom of the outer shell 2;

[0034] During the use of the conveyor belt 3, there will be residual powdered materials on the surface. When the conveyor belt 3 rotates, the exhaust fan 51 is started to exhaust air from the inside of the exhaust shell 5. At this time, air will be taken in from the top of the material receiving cover 52. At this time, the top of the material receiving cover 52 is facing the outer surface of the conveyor belt 3. The material can be sucked into the material receiving cover 52 by suction, and then the material enters the inside of the pipe 54. The pipe 54 can filter the material in the air inside. The filtered air is extracted to the outside of the exhaust shell 5 by the exhaust fan 51, and the residual material on the surface of the conveyor belt 3 is cleaned up in this reciprocating manner.

[0035] like Figure 3 to Figure 4 As shown, the top of the pipe 54 is connected to the connecting pipe near the material receiving cover 52, the lower open end of the pipe 54 is fixedly connected to the lower open end of the exhaust shell 5, and the bottom end of the exhaust shell 5 is threadedly connected to the bottom cover 55;

[0036] When the residual material enters the interior of the cloth tube 54, it will enter from the top opening of the cloth tube 54. After entering the interior of the cloth tube 54, the powdery material in the air will be filtered by the cloth tube 54, and the powdery material will fall off downward after being filtered. The powdery material after falling off will accumulate on the top of the bottom cover 55. After each use, the bottom cover 55 can be unscrewed from the bottom of the vacuum shell 5 to remove the powdery material accumulated in the cloth tube 54. After taking it out, the bottom cover 55 can be screwed into the bottom of the vacuum shell 5. In this way, the powdery material inside the vacuum shell 5 can be conveniently cleaned.

[0037] like Figure 3 As shown, a gas outlet cover 53 is fixed to the side of the gas extraction shell 5 away from the material receiving cover 52, and a plurality of heating wires 531 are fixed at equal intervals inside the gas outlet cover 53;

[0038] When the powdered material is transported at the top of the conveyor belt 3, there may be moisture inside the material, and the moisture will make the powdered material adhere more firmly to the surface of the conveyor belt 3. Therefore, when encountering this situation, the heating wire 531 is energized, and the vacuum shell 5 will exhaust air through the air outlet hood 53. At this time, the air inside the air outlet hood 53 is heated by the heating wire 531, and the heated air is sprayed on the surface of the conveyor belt 3, which can dry the material with moisture on the surface of the conveyor belt 3. The dried material will fall into the inside of the discharge hopper 22 along with other materials during the subsequent transportation process, which can reduce the waste of material. The material that does not fall will adhere to the surface of the conveyor belt 3.

[0039] like Figures 5 to 7 As shown, a second support frame 6 is provided above the receiving cover 52, the top of the second support frame 6 is fixedly connected to the first support frame 32, and a pressure roller 61 is rotatably connected to the middle of the second support frame 6, and the bottom end of the pressure roller 61 pushes the conveyor belt 3 into the inside of the receiving cover 52;

[0040] When the conveyor belt 3 moves, it passes through the bottom end of the pressure roller 61, and the pressure roller 61 pushes the conveyor belt 3 into the interior of the material receiving cover 52, so that the material receiving cover 52 can more easily take away the powdered material on the surface of the conveyor belt 3 when inhaling air. At the same time, when the conveyor belt 3 moves, it will drive the pressure roller 61 to rotate, reducing the friction between the pressure roller 61 and the conveyor belt 3.

[0041] like Figure 5 to Figure 6 As shown, an elastic plate 611 is fixed to the outside of the pressure roller 61, and six elastic plates 611 are arranged at equal intervals outside the pressure roller 61, and the extension direction of the elastic plates 611 is opposite to the moving direction of the conveyor belt 3;

[0042] During the rotation of the pressure roller 61, the pressure roller 61 drives the elastic plate 611 to flip over. The elastic plate 611 is elastic. When the elastic plate 611 contacts the conveyor belt 3, it will be bent by the conveyor belt 3. At the same time, the bent elastic plate 611 will lift up the surface of the conveyor belt 3, so that the dried powdered material adhered to the surface of the conveyor belt 3 can be cracked, and the cracked dried powdered material can more easily fall into the inside of the material receiving cover 52.

[0043] like Figure 5 to Figure 6 As shown, a pressure rod 612 is provided on one side of the pressure roller 61, and the pressure rod 612 is provided on one side of the extension direction of the elastic plate 611, and the top end of the pressure rod 612 is fixedly connected to the second support frame 6;

[0044] When the pressure roller 61 rotates and drives the elastic plate 611 to rotate in the direction of the conveyor belt 3, the elastic plate 611 will pass over the top of the pressure rod 612. At this time, the pressure rod 612 will contact the elastic plate 611, and the pressure roller 61 continues to drive the elastic plate 611 to rotate. At this time, the elastic plate 611 is deformed under the support of the pressure rod 612. When the elastic plate 611 passes the pressure rod 612, the elastic force is released. At this time, the elastic force of the elastic plate 611 drives the end of the elastic plate 611 away from the pressure roller 61 to hit the conveyor belt 3. The hitting of the conveyor belt 3 by the elastic plate 611 can make the cracked dry powdered material on the surface of the conveyor belt 3 fall off, which is more convenient for cleaning the dry powdered material.

[0045] like Figures 5 to 8 As shown, two groups of clamping rollers 62 are rotatably connected on both sides of the second support frame 6, and each group of clamping rollers 62 is provided with two, and the two clamping rollers 62 are arranged above and below one side of the second support frame 6, and the conveyor belt 3 is clamped between the two clamping rollers 62;

[0046] When the elastic plate 611 hits the conveyor belt 3, the entire conveyor belt 3 will vibrate, which may easily cause the powdered materials at other positions of the conveyor belt 3 to fall off and cannot fall into the material receiving cover 52. To prevent this situation, two sets of clamping rollers 62 are set to clamp the conveyor belt 3 on both sides of the pressure roller 61, so that the elastic plate 611 can only hit the conveyor belt 3 between the two sets of clamping rollers 62.

[0047] like Figures 5 to 8 As shown, a movable slot 521 is provided on one side of the top of the material receiving cover 52 close to the air outlet cover 53, a cleaning brush roller 63 is provided above the movable slot 521, a movable frame 632 is provided on one side of the second support frame 6 close to the cleaning brush roller 63, two groups of movable frames 632 are provided, and the two groups of movable frames 632 are rotatably connected with both ends of the cleaning brush roller 63, a first pulley 631 is fixed to the end of the rotating shaft at both ends of the cleaning brush roller 63, a side of one end of the movable frame 632 away from the first pulley 631 is rotatably connected with a transmission gear 633, a second pulley 634 is fixed to one end of the transmission gear 633 close to the first pulley 631, a belt is provided on the outside of the first pulley 631 and the second pulley 634, and output gears 621 are fixed to the ends of the rotating shaft at both ends of the clamping roller 62, and the output gear 621 is meshedly connected with the transmission gear 633;

[0048] When the conveyor belt 3 passes through the clamping roller 62, it will drive the clamping roller 62 to rotate. At this time, the clamping roller 62 drives the transmission gear 633 to rotate through the output gear 621. The transmission gear 633 drives the second pulley 634 to rotate. The second pulley 634 drives the first pulley 631 to rotate through the belt. When the first pulley 631 rotates, it drives the cleaning brush roller 63 to flip over. The cleaning brush roller 63 sweeps the surface of the conveyor belt 3, and can further sweep the material on the surface of the conveyor belt 3 into the inside of the material receiving cover 52.

[0049] like Figures 5 to 8 As shown, an electric telescopic rod 635 is fixed to the side of the second support frame 6 away from the cleaning brush roller 63, the output end of the electric telescopic rod 635 is fixedly connected to one side of the mobile frame 632, a guide rod 636 is arranged above the electric telescopic rod 635, one end of the guide rod 636 is fixedly connected to the mobile frame 632, a guide hole 64 is opened inside the second support frame 6, and one end of the guide rod 636 away from the mobile frame 632 is inserted into the guide hole 64;

[0050] When the material adhered to the surface of the conveyor belt 3 is relatively moist, the cleaning brush roller 63 sweeping the surface of the conveyor belt 3 will cause the material to adhere to the surface of the cleaning brush roller 63. Therefore, at this time, the cleaning brush roller 63 needs to be separated from the conveyor belt 3. At this time, the electric telescopic rod 635 is started to drive the movable frame 632 to move to the side away from the material receiving cover 52. At this time, the cleaning brush roller 63 can be driven to separate from the conveyor belt 3, and the transmission gear 633 is driven to separate from the output gear 621. When the hot air blown out by the air outlet hood 53 dries the surface of the conveyor belt 3, the electric telescopic rod 635 is started to drive the cleaning brush roller 63 to move toward the conveyor belt 3. At this time, the transmission gear 633 will re-engage with the output gear 621. At the same time, the guide rod 636 is telescopic inside the guide hole 64 to support and guide the movable frame 632.

[0051] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A flow accumulating scale, characterized by: The utility model comprises a base frame (1), a shell (2) is fixed at the top of the base frame (1), a feed hopper (21) is fixed at one side of the top of the shell (2), a discharge hopper (22) is fixed at the side of the inside of the shell (2) away from the feed hopper (21), the discharge hopper (22) extends to the bottom of the shell (2), a conveyor belt (3) is arranged inside the shell (2), a baffle is fixed at the side of the top of the discharge hopper (22) away from the conveyor belt (3), the height of the baffle is higher than the height of the top of the conveyor belt (3), rollers (31) are arranged at both sides and the middle of the inside of the conveyor belt (3), the outside of the rollers (31) are rotatably connected to a first support frame (32), one end of the first support frame (32) is installed with a motor (33), the motor (33) is connected to the rotating shaft of one of the rollers (31) through a reducer, and a cleaning mechanism for cleaning the surface of the conveyor belt (3) is arranged below the conveyor belt (3); The cleaning mechanism comprises an exhaust shell (5) arranged below the conveyor belt (3), the bottom end of the exhaust shell (5) being fixedly connected to the bottom end of the inside of the outer shell (2), connecting pipes being fixed on both sides of the top end of the exhaust shell (5), an exhaust fan (51) being installed inside one of the connecting pipes, a material receiving cover (52) being fixed on the top end of the connecting pipe away from the exhaust fan (51), a fabric pipe (54) being arranged inside the exhaust shell (5), the bottom end of the exhaust shell (5) penetrating the inside of the bottom end of the outer shell (2), and the bottom end of the exhaust shell (5) extending to the bottom of the outer shell (2); The top end of the cloth pipe (54) is connected to the connecting pipe close to the material receiving cover (52), the lower open end of the cloth pipe (54) is fixedly connected to the lower open end of the exhaust shell (5), and the bottom end of the exhaust shell (5) is threadedly connected to a bottom cover (55); An air outlet hood (53) is fixed to the side of the air extraction shell (5) away from the material receiving hood (52).

2. A flow accumulating scale according to claim 1, characterized in that: A plurality of heating wires (531) are fixed at equal intervals inside the gas outlet hood (53).

3. A flow accumulation scale according to claim 2, characterized in that: A second support frame (6) is arranged above the material receiving cover (52), the top end of the second support frame (6) is fixedly connected to the first support frame (32), and a pressure roller (61) is rotatably connected to the middle part of the second support frame (6), and the bottom end of the pressure roller (61) pushes the conveyor belt (3) into the interior of the material receiving cover (52).

4. A flow accumulating scale according to claim 3, characterized in that: An elastic plate (611) is fixed to the outside of the pressure roller (61), six elastic plates (611) are arranged at equal intervals outside the pressure roller (61), and the extension direction of the elastic plates (611) is opposite to the moving direction of the conveyor belt (3).

5. A flow accumulating scale according to claim 4, characterized in that: A pressure rod (612) is provided on one side of the pressure roller (61), the pressure rod (612) being arranged on one side of the extension direction of the elastic plate (611), and the top end of the pressure rod (612) being fixedly connected to the second support frame (6).

6. A flow accumulating scale according to claim 5, characterized in that: Two groups of clamping rollers (62) are rotatably connected on both sides of the second support frame (6), and each group of clamping rollers (62) is provided with two. The two clamping rollers (62) are arranged above and below one side of the second support frame (6), and the conveyor belt (3) is clamped between the two clamping rollers (62).

7. A flow accumulating scale according to claim 6, characterized in that: A movable slot (521) is provided on one side of the top of the material receiving hood (52) close to the air outlet hood (53); a cleaning brush roller (63) is provided above the movable slot (521); a movable frame (632) is provided on one side of the bottom of the second support frame (6) close to the cleaning brush roller (63); two groups of movable frames (632) are provided, and the two groups of movable frames (632) are rotatably connected to the two ends of the cleaning brush roller (63); the ends of the rotating shafts at the two ends of the cleaning brush roller (63) are fixed with first pulleys (631). ), one end of the movable frame (632) is rotatably connected to a transmission gear (633) at a side away from the first pulley (631), a second pulley (634) is fixed to an end of the transmission gear (633) close to the first pulley (631), a belt is sleeved on the outside of the first pulley (631) and the second pulley (634), and output gears (621) are fixed to the ends of the rotating shafts at both ends of the clamping roller (62), and the output gear (621) is meshingly connected to the transmission gear (633).

8. A flow accumulating scale according to claim 7, characterized in that: An electric telescopic rod (635) is fixed to a side of the second support frame (6) away from the cleaning brush roller (63); an output end of the electric telescopic rod (635) is fixedly connected to a side of the movable frame (632); a guide rod (636) is arranged above the electric telescopic rod (635); one end of the guide rod (636) is fixedly connected to the movable frame (632); a guide hole (64) is provided inside the second support frame (6); one end of the guide rod (636) away from the movable frame (632) is inserted into the guide hole (64).

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